US Patent 7775522 Automatic dice shaking system

An automatic dice shaking system includes multiple dice seat holders each having two locating grooves, multiple dice seats selectively attachable to the dice seat holders, each dice seat having an inner thread and locating rods attachable to the locating grooves of one dice seat holder to prohibit rotation of the respective dice seat relative to the respective dice seat holder, a dice cup connectable to one dice seat by threading an outer thread thereof into the inner thread of one dice seat and movable with the connected dice seat away from the dice seat holders to shake the respective set of dice, and a mechanical arm controllable to move the dice cup horizontally and vertically and to rotate the device cup.